"Oh, that's rather easy, Rose. It's not very different from your humans' ones. You can either blow or pump... Although some species also like to lick it... but they have a very special tongue... more like a suction cup, really."

"So, you mean like this? Do I make it right?"

"Oooh, yes. That's great! You are a very quick learner, Rose Tyler."

"Nah, not really. I did it with Mickey a few times after all."

"Rickey the idiot, eh? But, I bet he hasn't one as big as I have..."

"Oh, it's all about size for you, isn't it? Stop looking so smug or I'm going to stop!"